Variable exhaust nozzle for locomotives



Sept. 4, 1923. l v V1,466,788

v. z. cARAcRls-n I. VARIABLE EXHAUST NOZZLE FOR LOCOMOTIVES Filed ont. 11, 1920 2 s hee's,s1wet1 n: MUNI" will Sept. 4; 1923. 1,466,788

' V. Z. CARACRISTI VARIABLE EXHAUST. NOZZLE FOR LOVCOMOTIVES Vmed oct. `11, 1920 2 sheets-sheet 2 l -Ifllr x @1,6 f M Patented Sept.l 4, 1923.

Urrea Vvrizernius z. oenncnrsrr, orBiaoivxvrrrfn,:NEW Yoan.

-VARIABLE EXHAUST kNOZZLE FOR LOCOMOTIVES.

A .Application filed ctober 11, 1920. Serial 1\1'o..41(':i,234l.`Y

To all 'whom it may concern: v

Be it known that I,`VIRG1NIUs Z. CARA- oRisTI, a citizen of the UnitedV States, and a resident of Bronxville, in the -'county of Westchester and the` State ofllew York, have invented certain newand useful provements in Variable Exhaust Nozzles for Locomotives, of which the following is a specication.

This invention relates to ran improved variable exhaust nozzle for locomotives and has for its primaryobjectto provide a simply constructed adjustable nozzle of this type whereby the velocityv of the steam is? suing from the nozzle orice may be minute ly regulated and controlled. j

Generically considered,the present invention contemplates the provision of means wherebyA the area of the emission orifice of` the exhaust nozzle may be varied to increase or decrease the steam velocity and consequently the draft through the tire Atubes of the locomotive boiler, as circumstances may require. l

In the attainment of the above purposes, in .one embodiment of the invention I propose to provide a series of axially adjustable blades or vanos `within-the exhaust nozzle operable in the` emission orifice thereof and of variable width so that in the adjustment of said vanes, they will occupy a greater or less .proportion of the nozzle orifice whereby the steam velocity will be proportionately fixed or determined. Y

Generally my present improvement has for its purpose to provide a variable exhaust nozzle of this character which will be more efficient in operation `for the properV variation of the nozzle steam blast velocity than such nozzles as heretofore produced while at the same time, theV nozzler 'construct-ion' is simple, not liable to get out of, order and maybe manufactured and installed in locomotives of the Vpresent types at nomi-nal cost; j Y

kVi/'ith the above and other objects in view,

the' invention consists in an' improved form,

construction and relative arrangement of the several parts as will be hereinafter more fully described, illustrated" in the raccom panyingk drawingsV andl subsequently incorporated inthe subjoined claims.

In the` drawingsA wherein .I have shown several practical and desirable embodiments of the inventionand in which similar ref extends. Y Y j g. .Y

A ,One side ofthev nozzle body 5 is formed Y Y with a lateral bearing extension 17' fhavingff Y' y I taken -on Vshowing the adjustable blades or vanesin yprojected position to reduce the area of the emission orifice and obtain an exhaust blast of high velocityf Figure 6 Vis a horizontal sectional view taken on the line 'fofvFigure 4. j

VReferring in detail to the drawings` and more particularly to Figures l, 2, andi3 thereof, 5 designates the body of theexhaust nozzle which is bolted, or otherwisesecured 'attits lowerjendgin the usual manner to, a

base'plate orflange surrounding the lsteam exhaust pipe connection tothe .smoke box oftho locomotive. `.The upper portion of this body 5 is gradually tapered ori reduced in diameter and is preferably provided `with a detachable top VVsection 64 havinga iiange 7 projecting longitudinally in'relation lto the nozzle axis and which flangeV defines the nor'- i.

mal area of the' steam emission ignated by the numeral 8;?V

orifice des- The lower portion of the-body. isbisected by a vertically extending web"9.`pre"fer'.`

ably integralrwith thebody walls.l This .web is centrally formed with vertically spaced longitudinally. bored guides l0 and ll iie-v Y spectively for rod or shaft'lk2" Betweenthe spacelguides lO and-ll the] web 91 is provided withla vertical Vslot 13,'thelopposite' side faces ofwhich are concave, as-at14 ,in con'- f centric relation tothe rod ll2 which has slid-vV 'V ling vcontactwith said concave-faces'- The rod orshaft V,12.has a sectionof its exposed portion 'flattenedl on opposite Vsides thereof asl at 15 :and through flattened sectionV of the rod the transv rsel'y disposed f at one of their ends, said arms being located on relatively opposite sides of the vertical f web 9 and having their other ends bifurtending above the guide bearing 10 is reduced in diameter and screw-threaded as at i 22 to receive a head 23. This head carries diametrically opposed blades or vane's 2/1 which extend vertically through the upper nozzle section 6. Above the head 23, the inner edges. of the blades or vanes 24 are obliquely inclined upwardly and outwardly as at 25. 1t is thus seen that each of these blades gradually tapers or decreases in width to its upper end. Forthe purpose of properly guiding the blades 24 in their vertical movement, in thisembodiment of the invention I have shown the flange 7 provided with outwardly offset portions forming internal rectangular notches or recesses 26 in which the outer edges of the blades are engaged. Y A

In Figures 4 and 5 of the drawings I have illustrated a slightlyinodified form of this guiding means wherein the head section of the nozzle body is provided below the emission orifice and at diametrically opposite points with the inwardly projecting lugs 27,

`each of which is formed with a notch or 8 of the nozzle is of maximum area and the steam blast issues therefrom, at relatively low velocity. l/Vhen it is desired t0 increase the steam velocity in order to accelerate the passage of the" products of "combustion through the smoke box andthe fire tubes, the rock shaft 19 is actuated, and through the medium of the arms20,the rod 12 is moved upwardly. Thusthe severaljblades 24 will also be moved upwardly Vin the exhaust nozzle, and the wider portions of said blades will be moved int-o the emissionoritice, therebyreducing the effective 'area jof said orifice and correspondingly increasing the velocity of the steam issuing therefrom.

In this manner, an accurate.variationin the Vvelocity of the steam exhaust blast, through a considerable range, may be obtained.V

I have hereinj disclosed various alternative constructions of the invention, but itis also Y to be understood that the device might likewise be exemplified in numerous other mechanical embodiments and I therefore reserve the privilege of adopting all such legitimate changes in the form, construction and arrangement of the several parts as may be fairly embodied within the spirit and scope of the invention as'claimed.

I claim:

l. A variable exhaust nozzle comprising a body having an emission orifice, and relatively vadjustable meanssub-dividing said orifice into a plurality of variable steam emission areas.

2. A variable exhaust nozzle havingfixed and movable parts controlling the effective: area 0f the nozzle orifice and means'for adjusting the movable part to sub-divide the orifice into a plurality of variable steam emission areas.

3. A variable exhaust nozzle having fixe-d and movable parts, one of said parts being able part tovary the effective steaml emission area of the orifice.

a. body having a discharge orifice, and a dischargeV control member movable axially of said body and pro-vided with a pliufalityy of sections increasing in transverse area from their outer ends inwardly, engaging; the orifice, and adapted to vary the steam emission area thereof. e

5. A variable exhaust nozzle, comprising a bodyv having a vdischarge orifice, a Aldischarge control member movable axially of said body and providedwith a plurality of sections arranged in spaced relation to each feo 4. A variable exhaust nozzle, comprising other, increasing in transverse area from their outer ends inwardly,rengaging said orifice, and adapted to vary the steamv emis- Asion area thereof, and meansfor operating said discharge control `member axially of said body. v 'y y6. A variable exhaust nozzle having a body provided with an orifice, a plurality of members movable as a unit through said orifice and adapted to be positioned therein tovary the eective steam emission area of the orifice and means for actuating said members. Y Y y i 7. A variable exhaust nozzle including a body having an orifice, a rod axially movjable within said body, a plurality of blades fixed upon the upper end of said rodand having portions ofvarying width movable through said 0rifice,rme ans loperatively connected to said rod for positioning the blades in the orificeto therebyvary the effective steam emission areaE-of the orifice. Y

8. A variable exhaustxnozzle includinga vbody, having an axiallyV movable rod mounted in said body, diametrically opposed blades fixed upon theupper end, each having a tapering portion extending vertically through the orifice, and means for actuating said rodpto position said tapering blades in the orifice and thereby vary the effective steam emission area of the orifice.

' 9. A variable exhaust nozzle including a body having an orifice, an axially movable rod mounted in said body, a plurality` of diametrically opposed blades fixed to the upper end of said rod and veach having a tapering portion extending vertically Wall receiving the outer edges of said blades,

Intestimony that he claims the foregoing as his invention, he has signed his name hereunder. Y Y VIRGINIUS Z. CARAGRIST1.l

and means for actuating said rod to position the tapering portions of the bladesin saidV Yorifice and thereby vary the effect of the Vsteam emission area of the orifice. 

